Self-threading loom-shuttle.



PATENTED MAY'5,"1903.

J. NORTHROP. SELF THREADING LOOM SHUTTLE.

Jbm name if APPLICATION FILED NOV. 24, 1902.

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UNITED STATES Patented May 5-, 1903.-

PATENT OFFICE.

JONAS NORTHROP, OF HOPEDALE, MASSACHUSETT ASSIGNOR To DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

SELF-THREADING LOOM-SHUTTLE.

SPECIFICATION forming part of Letters Patent No. 726,977, dated May 5, 1908. Application filed November 24, 1902. Serialllu. 132,548. (No model.)

To all whom it may concern:

Be it known that I, JONAS NORTHROP, a Subject of the King of Great Britain, and a resident of Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Self- Threading Loom Shuttles, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates particularly to loomshuttles of the type wherein the filling thread is directed automatically to a delivery-eye after a fresh supply of filling has been inserted automatically in the shuttle.

One of the objects of my present invention is the improvement and simplification of the means for effecting the threading of the shuttle automatically and also the cheapening of the cost of manufacture of such means.

Another object of my invention is the pro vision of means for preventing a loop or bight of thread when formed from catching and causing filling breakage and also to prevent such a loop from acting to unthread the shuttle.

The several novel features of my invention will be described fully hereinafter and pointed out particularly in the following claims.

Figure 1 is a top or plan view of a loomshuttle embodying one form of my invention, the threading-block being shown in place. Fig. 2 is an enlarged longitudinal sectional detail on the line 2 2, Fig. 1. Fig. 3 is an outer face view of the smaller or auxiliary member of the threading-block. Fig. 4. is an inner face view thereof, and Fig. 5 is a front end elevation of the larger main member of the threading-block.

The shuttle-body A, open at top and bottom, is provided with suitable jaws A to receive and grasp the head of a filling-carrier, (not shown,) the shuttle-body having a side delivery-eye a) and being cut out longitudinally at its front end to receive the threading device or block. I have made the latter in two parts or members divided transversely near its rear end, the larger or main member being shown separately in Fig. 5 and indicated as a whole by the letter B, while the smaller auxiliary member is shown separately in two views in Figs. 3 and 4 and indicated as a whole by the letter C, the members being made separately to simplify and cheapen the cost of manufacture.

The main member B is made as a casting and comprises two upright side walls I) 17, connected at their bases at b to present between them a trough-like open longitudinal threadpassage 5 and the inner faces of the side walls are made upwardly divergent to increase the width of the passage at the top. The front edge of wall 2) is upwardly and forwardly inclined to constitute a horn b and a flat lateral enlargement is formed on the wall above the horn to present a head I), substantially triangular in shape. (See Fig. 1.) 7 At its forward apex the head is shaped to present a rearwardly-curved beak b which extends transversely over the open front end of the thread-passagelfi. Onitsundersidethehead has an outwardly extended lateral shoulder 1), which fits down into a recess in the Shuttle wood, and the convex Outer edge 12 of the head, leading from the beak rearwardly and down to the shoulder, acts with the horn in directing the thread from the thread passage into the delivery eye a As shown in Fig. 5, the heel b of the horn points downward for the thread to pass under it, and back of the heel is the usual prong b for the thread to draw over as it is delivered from the passage 1) to the deliveryeye. The side wall b has a forward extension I), Fig. 2, which is laterally enlarged at its top to form a shield b, which extends laterally over the front end of the thread-passage and overlaps the beak b", as clearly shown in Figs. 1 and 5, leaving a slight clearance 25 between them. As shown in Fig. 1, the shield extends forward beyond the beak, and its inner edge 5 extends diagonally forward across the passage b and the beak. I prefer to slope or curve the upper surface of the shield forward or downward, as best Shown in Fig. 2, to assist in directing the thread onto the head I). A transverse hole is made in the member B, crossing the bottom of the thread-passage, to receive the retaining-bolt 8, which holds the block in the shuttle.

The auxiliary member 0 is made as a separate casting having a width somewhat greater than that of the member B, as shown in the drawings, the upright sides of the member 0 being rounded at 0 Fig. 1, to enter a correspondingly-shaped recess made in the shuttle-wood. At its lower end said member has a transverse recess 0 formed in its inner face to receive a friction-pad p, of felt or other suitable material, and a forwardly-projecting lip 0' is made at the bottom of the recess to enter a cut-away part 19, of the member B (see Fig. 2) when the parts are assembled. In Fig. 2 it will be seen that the part of member B overhanging the lip 0 serves to hold the member 0 in position in the shut-tle, and the adjacent upright faces of the two members closely abut, making a substantially continuous block. Intersecting the recess 0 is a nearly tubular inlet opening or passage 0 through the member 0, the walls of which are flared on the inner side, (see Fig. 4,) this inlet registering with the adjacent end ofthe thread-passage o The top of member 0 is shaped to present two opposite downturned guards 0 0 located at opposite sides of a thread-entrance 0 the upper surfaces of the guards being flared at 30 and 40, respectively, to made a wide mouth for the entrance. The guard c is above and overhangs the guard 0 and the latter in turn overhangs the open top of the inlet 0 as clearly shown in Figs. 3 and 4, so that the thread must follow a sinuous path from the threadentrance to the inlet.

When a supply of filling is inserted in the shuttle, the free end of the thread is held fast, and-when the shuttle is thrown to the left, viewing Fig. 1, the thread draws off over the tip of the filling-carrier and enters the thread-entrance 0 passing underneath the guard 0 and thence sliding down over the convex surface of the guard c and into the inlet 0 During this operation the thread will also have drawn over the shield 19 and its diagonal edge Z9 will have shed the thread onto the head b the thread by reason of the pull thereon immediately entering the clearance between the shield and beak and sliding from the latter into the thread-passage 12 On the next throw of the shuttle to the right the thread is guided by the horn b to the delivery-eye a and the shuttle is then completely threaded, delivery of the thread thereafter being from the eye a The rotative movement of the thread as it is drawn from the filling-carrier is from right to left, viewing Fig. 3, so there is no tendency to fly up and out of the inlet. If it should fly up out of the inlet, however, it would be thrown under the guard a and directed down into theinletagain, and if bysome very remote possibility the thread should get past this guard it would then be held by the opposite guard 0 The thread is thus prevented from leaving the inlet end of the thread-passage. Should a loop of thread be thrown out and forward, it will fall over one or both of the guards and then into the open space between them and the heads, and it will be drawn down into the thread-entrance as soon as the flight of the shuttle tightens the loop without breakage. An abnormally long loop might be thrown forward upon the shield b; but it could not pass under it and catch around the beak, as the rearward curve of the latter would either block the passage of the loop or the latter would be shed bodily by the head into the thread-passage. If either the-shield or the beak entered the bight of the loop, the thread would not break, for as soon as the loop tightened it would slip oif either of said parts and straighten out.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an automatically self-threading shuttle, a block having in its base a longitudinal thread-passage provided at its inner end with an-inlet and a guarded thread-entrance leading thereto, a horn having a head provided with a rearwardly-curved and lateral beak extending transversely overand across the open front end of the thread-passage, and a shield extended laterally from the opposite side wall thereof and overlapping the beak.

2. In an automatically self-threading shuttle, a block having in its base a longitudinal thread-passage provided at its inner end with an inlet and a guarded thread-entrance leading thereto, a laterally-widened head on one side wall of the thread-passage, terminating in a rearwardly-curved and lateral beak extending transversely over and across the open front end of thethread-passage, and a shield extended laterally from the opposite side wall thereof and overlapping the beak, the inner edge of the shield leading diagonally over the thread-passage across the beak.

3. In an automatically self-threading shuttle, a block having in its base a longitudinal thread-passage provided at its inner end with an inlet and a guarded thread-entrance leading thereto, a horn having a head provided with a rearwardly-curved and lateral beak extending transversely over and across the open front end of the thread-passage, and a shield extended laterally from the opposite side wall thereof and overlapping the beak, the shield projecting at its front end beyond the forward edge of the beak.

t. In an automatically self-threading shuttle, a block having in its base a longitudinal thread-passage provided at its inner end with an inletand a thread-entrance leading thereto, downturned guards on opposite sides of the thread-entrance and one overhanging the other, a horn having a head provided with a rearwardly-curved beak extending transversely over the open front end of the threadpassage, and a shield extended laterally from the opposite side wall thereof and overlapping the beak.

5. A two-part threading-block for loomshuttles, separated transversely at its rear end to present a main member having a 1ongitudinal thread-passage therein, a horn having a head terminating in a rearwardly-curved beak extending transversely over the open front end of the thread-passage, and ashield extended laterally from the opposite side wall thereof to overlap and project beyond the beak, and an auxiliary member having an inlet for the thread-passage and a thread-entrance leading to the inlet, and downturned guards on opposite sides of the thread-entrance, the guards being located one above the other and having their upper faces oppositely flared, to guide the thread down between them.

6. A two-part threading-block for loomshuttles, separated transversely at its rear end to present a main member having a longitudinal thread-passage therein, a horn having ahead terminating in a rearWardly-curved beak extending transversely over the open front end of the thread-passage, and a shield extended laterally from the opposite side wall thereof to overlap and project beyond the beak, and an auxiliary memberhaving an inlet for the thread-passage and a thread-entrance leading to the inlet, said inlet and thread-entrance being flared from the rear face forward toward the adjacent end of the thread-passage, and downturned guards on opposite sides of the thread-entrance, the 30 guards being located one above the other and having their upper faces oppositely flared to guide the thread down between them.

7. A two-part threading-block for loomshuttles, separated transversely at its rear 'endto present a main member having a lonopposite sides of the thread-entrance, and a transverse recess in the auxiliary member across the inner face of the inlet, to receive a tension-pad.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JONAS N ORTHROP.

Witnesses:

' GEORGE OTIS DRAPER,

ERNEST WARREN WOOD. 

